CN109904976B - Two segmentation new energy automobile motor shafts - Google Patents
Two segmentation new energy automobile motor shafts Download PDFInfo
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- CN109904976B CN109904976B CN201910251098.0A CN201910251098A CN109904976B CN 109904976 B CN109904976 B CN 109904976B CN 201910251098 A CN201910251098 A CN 201910251098A CN 109904976 B CN109904976 B CN 109904976B
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Abstract
The invention discloses a two-section type new energy automobile motor shaft, which comprises a motor shaft body; an iron core mounting structure is arranged at the axial middle part of the motor shaft body and used for mounting a rotor iron core; the motor shaft body comprises a shaft body section and a shaft body connecting section which are coaxially arranged; the iron core mounting structure comprises a strip-shaped mounting groove which is arranged on the surface of the inner end of the shaft body section and is arranged along the axial direction of the iron core mounting structure, a heat dissipation cavity is arranged on the end surface of the inner end of the shaft body section inwards along the axial direction of the iron core mounting structure, and the depth dimension of the heat dissipation cavity is larger than or equal to the length dimension of the mounting groove; the circumferential surface of the inner end of the shaft body connecting section is provided with an external spline, and the inner side of the external spline on the shaft body connecting section is provided with a first positioning shaft shoulder; the inner circumferential wall of the outer end of the heat dissipation cavity is provided with an inner spline matched with the outer spline, and the outer spline can be in driving insertion fit with the inner spline. The invention has the advantages of improving the heat dissipation capability and better reducing the use cost.
Description
Technical Field
The invention belongs to the technical field of forging, and particularly relates to a two-section type new energy automobile motor shaft.
Background
The shaft is a cylindrical object which is penetrated in the middle of the bearing or the middle of the wheel or the middle of the gear, but a small part of the shaft is square. The shaft is used for supporting and rotating with the rotating part to transmit motion,Torque ofOr mechanical parts with bending moments. Typically in the form of a metal rod, each section may have a different diameter. The parts of the machine that rotate are mounted on the shaft. The motor shaft is a member which is coaxially arranged in the motor stator, fixedly provided with the motor stator and used for outputting motor torque.
The motor shaft of the new energy automobile is used as a transmission component, has high precision requirement, and is required to have good heat dissipation effect in the using process so as to better meet the requirements on usability and safety. However, in the process of rotating and outputting power, the rotor core generates heat and transfers the heat to a corresponding part on the motor shaft, and the part on the motor shaft opposite to the rotor core is relatively closed due to the fact that the rotor core is fixed, so that the heat dissipation efficiency is low, and the structures such as coils on the rotor core are easily damaged after the temperature rises.
In the use process of the motor shaft, as the rotating output end of the motor shaft is used for being in transmission connection with an external transmission component, generally, the rotating output end of the motor shaft is a part which is firstly worn and damaged, once the part is worn and damaged, the whole motor shaft can be caused to fail, and the use cost of the motor shaft is increased. In addition, in the use process of the existing motor shaft structure, the whole motor shaft is scrapped as long as a certain section of the motor shaft is damaged and fails, so that the use cost is increased.
Therefore, how to provide a two-stage new energy automobile motor shaft capable of improving heat dissipation capability and better reducing use cost becomes a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a two segmentation new energy automobile motor shaft that can improve heat-sinking capability, reduction use cost that can be better.
In order to solve the technical problems, the invention adopts the following technical scheme:
a two-section type new energy automobile motor shaft comprises a motor shaft body; an iron core mounting structure is arranged at the axial middle part of the motor shaft body and used for mounting a rotor iron core; the motor shaft is characterized in that the motor shaft body comprises a shaft body section and a shaft body connecting section which are coaxially arranged; the iron core mounting structure comprises a strip-shaped mounting groove which is arranged on the surface of the inner end of the shaft body section and is arranged along the axial direction of the iron core mounting structure, a heat dissipation cavity is arranged on the end surface of the inner end of the shaft body section inwards along the axial direction of the iron core mounting structure, and the depth dimension of the heat dissipation cavity is larger than or equal to the length dimension of the mounting groove; the circumferential surface of the inner end of the shaft body connecting section is provided with an external spline, and the inner side of the external spline on the shaft body connecting section is provided with a first positioning shaft shoulder; the inner peripheral wall of the outer end of the heat dissipation cavity is provided with an inner spline matched with the outer spline, the outer spline can be in driving insertion fit in the inner spline, and the inner side face of the first positioning shaft shoulder is attached to the inner end face of the shaft body section.
Therefore, the two-section type new energy automobile motor shaft is designed into two sections and is connected through the internal spline and the external spline, and the two sections of shafts can be processed more conveniently to shorten the processing period. Through the mode of internal spline and outer spline connection, motor shaft wearing and tearing destroy the back, can correspond change the motor shaft that produces wearing and tearing and destruction, one section undamaged shaft part can continue to use in addition to reduction use cost that can be better. Foretell motor shaft is at the during operation, because of being provided with the heat dissipation chamber, rotor coil can transmit the heat that it produced to the motor shaft through rotor core on, because of the heat dissipation chamber that sets up on the motor shaft, can make heat transfer to the heat dissipation intracavity for the heat can be relative distribute away, in order to reach better radiating effect, thereby reach the purpose of protection rotor coil and rotor core, thereby improve the radiating effect of whole motor shaft. The depth dimension of heat dissipation chamber is corresponding with the length dimension of mounting groove among the iron core mounting structure, and this improvement radiating effect that just can be further, the rigidity of assurance motor shaft that also can be better simultaneously. The structural construction of motor shaft makes it can have certain guard action to the rotor coil in the use, and it has the advantage that performance is better. In conclusion, the motor shaft with the structure has the advantages of being capable of improving the heat dissipation capacity and reducing the use cost better.
Preferably, the internal spline is in interference fit with the external spline.
Thus, the design is more reasonable and the connection is more reliable.
Preferably, the inner spline is matched with the outer spline in a H6/s6 mode.
Thus, the design is more reasonable and the connection is more reliable.
As optimization, a water inlet hole is arranged on the end surface of the outer end of the shaft body section along the axial direction of the shaft body section; a through hole which penetrates through the shaft body connecting section and is axially arranged is arranged on the shaft body connecting section, and the inner end of the through hole is connected with the outer end of the heat dissipation cavity and is communicated with the heat dissipation cavity; the outer end of the water inlet hole is used for being connected with a water supply structure.
Like this, the motor shaft of above-mentioned structure is in the use, and the inlet opening outer end is used for linking to each other and supplies water to it with water supply structure, and water gets into the inside axial of motor shaft and inwards flows to it is rotatory in the motor shaft working process, make water can be even flow to the heat dissipation intracavity on the internal perisporium, in order to reach the cooling to the motor shaft, better to the epaxial cooling heat dissipation with rotor core relative position of motor, and water can follow the through-hole and flow, make water circulation flow, can improve the radiating effect.
As optimization, the water inlet comprises a large-diameter section of the water inlet at the inner end and a small-diameter section of the water inlet at the outer end, so that the whole water inlet is in a stepped hole structure; and install the nozzle in the outer end of the big diameter section of inlet opening, the end of intaking of nozzle switches on with the little diameter section of inlet opening and links to each other, and the outer end of the little diameter section of inlet opening is used for linking to each other with the water supply structure.
Like this, through being whole with the inlet opening design and being the shoulder hole structure, can the easy to assemble nozzle to the installation sets up the nozzle in the inlet opening inner, and atomizing nozzle can be chooseed for use to the nozzle, and the nozzle can spout water smoke and act on the internal perisporium in heat dissipation chamber, improves the homogeneity of water spray, makes the heat dissipation more even. Can be better cool down whole motor shaft to improve the radiating efficiency of whole motor shaft, and the heat dissipation is even. Through setting up the nozzle for whole heat radiation structure is simpler and improvement heat-sinking capability that can step forward.
As optimization, both ends of the through hole are provided with a rounded corner structure.
Thus, the design is more reasonable.
Preferably, the shaft body connecting section is of a stepped shaft structure with a large inner end diameter and a small outer end diameter, and the first positioning shaft shoulder is arranged on the outer side of the large end of the shaft body connecting section.
Like this, can be better carry out axial positioning to the axis body linkage segment, the required precision of whole motor shaft of assurance that can be better
As optimization, the through hole comprises a through hole large-diameter section corresponding to the large end of the shaft body connecting section and a through hole small-diameter section corresponding to the small end of the shaft body connecting section; and the whole through hole is in a stepped hole structure with a large inner end diameter and a small outer end diameter.
Like this, through being the big little stepped hole structure of outer end diameter of inner end diameter with the through-hole setting for insert the partial wall thickness of heat dissipation intracavity on the axis body linkage segment littleer, can improve the radiating effect.
As optimization, the diameter of first location shaft shoulder is less than or equal to the diameter of axle body section, and is equipped with the first groove of stepping down on the circumferential surface of first location shaft shoulder, just the first groove of stepping down links up with the mounting groove and is the intercommunication setting along the circumferential direction of axle body section.
Like this, whole structural design is more reasonable, and can the fixed rotor core of easy to assemble.
As optimization, the whole shaft body section is of a stepped shaft structure with a large inner end diameter and a small outer end diameter, and the outer end of the small-diameter section of the shaft body section is provided with an external spline which is parallel to form a transmission output end.
Thus, the structure is simpler, and the design is more reasonable.
As optimization, the major diameter of axle body section is served and is deviated from one side of axis body linkage segment is equipped with second location shaft shoulder, and is equipped with the second groove of stepping down on the circumferential surface of second location shaft shoulder, the second groove of stepping down links up with the mounting groove and is the intercommunication setting along the circumferential direction of axle body section.
Like this, can be more convenient carry out axial positioning to the rotor core who installs on the axis body section.
Preferably, the mounting grooves are two and are uniformly distributed along the circumferential direction of the shaft body section.
Thus, the rotor core can be more conveniently mounted on the shaft section.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a cross-sectional view in the vertical direction of fig. 1 (the nozzle is not shown in the drawing).
Fig. 3 is a sectional view in the horizontal direction of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the specific implementation: as shown in fig. 1 to 3, a two-section type new energy automobile motor shaft includes a motor shaft body 1; an iron core mounting structure is arranged at the axial middle part of the motor shaft body and used for mounting a rotor iron core; the motor shaft body comprises a shaft body section 2 and a shaft body connecting section 3 which are coaxially arranged; the iron core mounting structure comprises a strip-shaped mounting groove 4 which is arranged on the surface of the inner end of the shaft body section and is arranged along the axial direction of the iron core mounting structure, a heat dissipation cavity 5 is arranged on the end surface of the inner end of the shaft body section and is inwards arranged along the axial direction of the shaft body section, and the depth dimension of the heat dissipation cavity is larger than or equal to the length dimension of the mounting groove; the circumferential surface of the inner end of the shaft body connecting section is provided with an external spline 15, and the inner side of the external spline on the shaft body connecting section is provided with a first positioning shaft shoulder 11; the inner peripheral wall of the outer end of the heat dissipation cavity is provided with an inner spline 16 matched with the outer spline, the outer spline 15 can be in driving splicing fit with the inner spline 16, and the inner side face of the first positioning shoulder 11 is attached to the end face of the inner end of the shaft body section.
Therefore, the two-section type new energy automobile motor shaft is designed into two sections and is connected through the internal spline and the external spline, and the two sections of shafts can be processed more conveniently to shorten the processing period. Through the mode of internal spline and outer spline connection, motor shaft wearing and tearing destroy the back, can correspond change the motor shaft that produces wearing and tearing and destruction, one section undamaged shaft part can continue to use in addition to reduction use cost that can be better. Foretell motor shaft is at the during operation, because of being provided with the heat dissipation chamber, rotor coil can transmit the heat that it produced to the motor shaft through rotor core on, because of the heat dissipation chamber that sets up on the motor shaft, can make heat transfer to the heat dissipation intracavity for the heat can be relative distribute away, in order to reach better radiating effect, thereby reach the purpose of protection rotor coil and rotor core, thereby improve the radiating effect of whole motor shaft. The depth dimension of heat dissipation chamber is corresponding with the length dimension of mounting groove among the iron core mounting structure, and this improvement radiating effect that just can be further, the rigidity of assurance motor shaft that also can be better simultaneously. The structural construction of motor shaft makes it can have certain guard action to the rotor coil in the use, and it has the advantage that performance is better. In conclusion, the motor shaft with the structure has the advantages of being capable of improving the heat dissipation capacity and reducing the use cost better.
In this embodiment, the internal spline 16 is in interference fit with the external spline 15.
Thus, the design is more reasonable and the connection is more reliable.
In the present embodiment, the internal spline 16 and the external spline 15 are H6/s 6.
Thus, the design is more reasonable and the connection is more reliable.
In the embodiment, a water inlet hole 6 is arranged on the end surface of the outer end of the shaft body section 2 along the axial direction of the shaft body section; a through hole 10 which penetrates through the shaft body connecting section 3 in the axial direction is formed in the shaft body connecting section 3, and the inner end of the through hole is connected with the outer end of the heat dissipation cavity and is communicated with the heat dissipation cavity; the outer end of the water inlet hole is used for being connected with a water supply structure.
Like this, the motor shaft of above-mentioned structure is in the use, and the inlet opening outer end is used for linking to each other and supplies water to it with water supply structure, and water gets into the inside axial of motor shaft and inwards flows to it is rotatory in the motor shaft working process, make water can be even flow to the heat dissipation intracavity on the internal perisporium, in order to reach the cooling to the motor shaft, better to the epaxial cooling heat dissipation with rotor core relative position of motor, and water can follow the through-hole and flow, make water circulation flow, can improve the radiating effect. When concrete implementation, be provided with seal structure between the inner of axis body linkage segment and heat dissipation chamber outer end internal perisporium, seal structure can adopt to set up round waterproof gasket, and what like this can be better avoids water to flow to the outside from between the clearance of internal spline and external splines for the design is more reasonable.
In the specific embodiment, the water inlet hole 6 comprises a water inlet hole large-diameter section 8 at the inner end and a water inlet hole small-diameter section 9 at the outer end, so that the whole water inlet hole is in a stepped hole structure; and install the nozzle in the outer end of inlet opening large diameter section 8, the end of intaking of nozzle switches on with the little diameter section of inlet opening and links to each other, and the outer end of the little diameter section of inlet opening is used for linking to each other with the water supply structure.
Like this, through being whole with the inlet opening design and being the shoulder hole structure, can the easy to assemble nozzle to the installation sets up the nozzle in the inlet opening inner, and atomizing nozzle can be chooseed for use to the nozzle, and the nozzle can spout water smoke and act on the internal perisporium in heat dissipation chamber, improves the homogeneity of water spray, makes the heat dissipation more even. Can be better cool down whole motor shaft to improve the radiating efficiency of whole motor shaft, and the heat dissipation is even. Through setting up the nozzle for whole heat radiation structure is simpler and improvement heat-sinking capability that can step forward.
In this embodiment, both ends of the through hole 10 are provided with rounded structures.
Thus, the design is more reasonable.
In this embodiment, the shaft connecting section 3 is integrally a stepped shaft structure with a large inner end diameter and a small outer end diameter, and the first positioning shoulder 11 is arranged outside the large end of the shaft connecting section.
Like this, can be better carry out axial positioning to the axis body linkage segment, the required precision of whole motor shaft of assurance that can be better
In this embodiment, the through hole 10 includes a through hole large diameter section 12 corresponding to the large end of the shaft connecting section, and a through hole small diameter section 13 corresponding to the small end of the shaft connecting section; and the whole through hole is in a stepped hole structure with a large inner end diameter and a small outer end diameter.
Like this, through being the big little stepped hole structure of outer end diameter of inner end diameter with the through-hole setting for insert the partial wall thickness of heat dissipation intracavity on the axis body linkage segment littleer, can improve the radiating effect.
In this embodiment, the diameter of first location shoulder 11 is less than or equal to the diameter of axle body section 2, and is equipped with the first groove of stepping down on the circumferential surface of location shoulder, just the first groove of stepping down links up with the mounting groove and is the intercommunication setting along the circumferential direction of axle body section.
Like this, whole structural design is more reasonable, and can the fixed rotor core of easy to assemble.
In this embodiment, the whole shaft body 2 is a stepped shaft structure with a large inner end diameter and a small outer end diameter, and the outer end of the small-diameter section of the shaft body is provided with an external spline and is parallel to form a transmission output end.
Thus, the structure is simpler, and the design is more reasonable.
In this embodiment, the major diameter of axis body section 2 is served and is deviated from one side of axis body linkage segment is equipped with second location shaft shoulder 14, and is equipped with the second groove of stepping down on the circumferential surface of second location shaft shoulder, the second groove of stepping down links up with the mounting groove and is the intercommunication setting along the circumference direction of axis body section.
Like this, can be more convenient carry out axial positioning to the rotor core who installs on the axis body section.
In this embodiment, the two mounting grooves 4 are uniformly distributed along the circumferential direction of the shaft body section.
Thus, the rotor core can be more conveniently mounted on the shaft section.
Claims (7)
1. A two-section type new energy automobile motor shaft comprises a motor shaft body (1); an iron core mounting structure is arranged at the axial middle part of the motor shaft body and used for mounting a rotor iron core; the motor shaft is characterized in that the motor shaft body comprises a shaft body section (2) and a shaft body connecting section (3) which are coaxially arranged; the iron core mounting structure comprises a strip-shaped mounting groove (4) which is arranged on the surface of the inner end of the shaft body section and is arranged along the axial direction of the iron core mounting structure, a heat dissipation cavity (5) is arranged on the end surface of the inner end of the shaft body section inwards along the axial direction of the shaft body section, and the depth dimension of the heat dissipation cavity is larger than or equal to the length dimension of the mounting groove; an external spline (15) is arranged on the circumferential surface of the inner end of the shaft body connecting section, and a first positioning shaft shoulder (11) is arranged on the inner side of the external spline on the shaft body connecting section; an inner spline (16) matched with the outer spline is arranged on the inner peripheral wall of the outer end of the heat dissipation cavity, the outer spline (15) can be in driving insertion fit in the inner spline (16), and the inner side surface of the first positioning shaft shoulder (11) is attached to the end surface of the inner end of the shaft body section;
a water inlet hole (6) is arranged on the end surface of the outer end of the shaft body section (2) along the axial direction of the shaft body section; a through hole (10) which penetrates through the shaft body connecting section (3) in the axial direction is formed in the shaft body connecting section, and the inner end of the through hole is connected with the outer end of the heat dissipation cavity and is communicated with the heat dissipation cavity; the outer end of the water inlet hole is used for being connected with a water supply structure;
the water inlet hole (6) comprises a water inlet hole large-diameter section (8) at the inner end and a water inlet hole small-diameter section (9) at the outer end, so that the whole water inlet hole is of a stepped hole structure; the outer end of the large-diameter section (8) of the water inlet hole is provided with a nozzle, the water inlet end of the nozzle is communicated and connected with the small-diameter section of the water inlet hole, and the outer end of the small-diameter section of the water inlet hole is used for being connected with a water supply structure;
the through hole comprises a through hole large-diameter section corresponding to the large end of the shaft body connecting section and a through hole small-diameter section corresponding to the small end of the shaft body connecting section; and the whole through hole is in a stepped hole structure with a large inner end diameter and a small outer end diameter.
2. The two-segment type motor shaft of the new energy automobile according to claim 1, wherein the internal spline (16) is in interference fit with the external spline (15).
3. The two-segment motor shaft of the new energy automobile according to claim 1, wherein the internal spline (16) and the external spline (15) are H6/s 6.
4. The two-stage type new energy automobile motor shaft according to claim 1, wherein both ends of the through hole (10) are provided with a rounded corner structure.
5. The two-stage motor shaft of the new energy automobile according to claim 1, wherein the through hole (10) comprises a large diameter portion (12) of the through hole corresponding to the large end of the shaft connecting section and a small diameter portion (13) of the through hole corresponding to the small end of the shaft connecting section; and the whole through hole is in a stepped hole structure with a large inner end diameter and a small outer end diameter.
6. The two-stage motor shaft of the new energy automobile according to claim 1, wherein the diameter of the first positioning shoulder (11) is smaller than or equal to the diameter of the shaft body section (2), and a first abdicating groove is formed on the circumferential surface of the positioning shoulder, and the first abdicating groove is connected with the mounting groove and is communicated with the mounting groove along the circumferential direction of the shaft body section.
7. The two-stage motor shaft of the new energy automobile according to claim 1, wherein the shaft section (2) is a stepped shaft structure with a larger inner end diameter and a smaller outer end diameter, and the outer end of the smaller diameter section of the shaft section is provided with an external spline and is parallel to form a transmission output end;
a second positioning shaft shoulder (14) is arranged on one side, away from the shaft body connecting section, of the large-diameter end of the shaft body section (2), a second abdicating groove is formed in the circumferential surface of the second positioning shaft shoulder, and the second abdicating groove is connected with the mounting groove and is communicated with the mounting groove along the circumferential direction of the shaft body section;
the mounting grooves (4) are two and are uniformly distributed along the circumferential direction of the shaft body section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251098.0A CN109904976B (en) | 2019-03-29 | 2019-03-29 | Two segmentation new energy automobile motor shafts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251098.0A CN109904976B (en) | 2019-03-29 | 2019-03-29 | Two segmentation new energy automobile motor shafts |
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| Publication Number | Publication Date |
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| CN109904976A CN109904976A (en) | 2019-06-18 |
| CN109904976B true CN109904976B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910251098.0A Active CN109904976B (en) | 2019-03-29 | 2019-03-29 | Two segmentation new energy automobile motor shafts |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113014016A (en) * | 2021-02-09 | 2021-06-22 | 珠海格力电器股份有限公司 | Cooling system, rotor structure and have its motor |
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| CN106329868A (en) * | 2015-06-30 | 2017-01-11 | 西门子公司 | Motor, electric vehicle with same motor, and hybrid vehicle with same motor |
| CN107667027A (en) * | 2015-06-03 | 2018-02-06 | 蒂森克虏伯普利斯坦技术中心股份公司 | hollow shaft device |
| WO2018033388A1 (en) * | 2016-08-17 | 2018-02-22 | Bayerische Motoren Werke Aktiengesellschaft | Electrical machine and vehicle comprising the electrical machine |
| CN207677561U (en) * | 2018-01-08 | 2018-07-31 | 温岭市通驰汽车空调制造有限公司 | A kind of machine shaft |
| CN208353138U (en) * | 2018-07-24 | 2019-01-08 | 重庆长安汽车股份有限公司 | Driving motor and drive motor shaft |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3465886B1 (en) * | 2016-06-07 | 2022-08-03 | Tesla, Inc. | Electric motor cooling system |
| DE102016215979A1 (en) * | 2016-08-25 | 2018-03-01 | Thyssenkrupp Ag | Built rotor shaft of asymmetric design as well as rotor and method of manufacturing the built rotor shaft and the rotor |
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2019
- 2019-03-29 CN CN201910251098.0A patent/CN109904976B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107667027A (en) * | 2015-06-03 | 2018-02-06 | 蒂森克虏伯普利斯坦技术中心股份公司 | hollow shaft device |
| CN106329868A (en) * | 2015-06-30 | 2017-01-11 | 西门子公司 | Motor, electric vehicle with same motor, and hybrid vehicle with same motor |
| WO2018033388A1 (en) * | 2016-08-17 | 2018-02-22 | Bayerische Motoren Werke Aktiengesellschaft | Electrical machine and vehicle comprising the electrical machine |
| CN207677561U (en) * | 2018-01-08 | 2018-07-31 | 温岭市通驰汽车空调制造有限公司 | A kind of machine shaft |
| CN208353138U (en) * | 2018-07-24 | 2019-01-08 | 重庆长安汽车股份有限公司 | Driving motor and drive motor shaft |
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| CN109904976A (en) | 2019-06-18 |
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